Vehicle front passenger seat airbag device

Abstract

A vehicle front passenger seat airbag device includes a plurality of inflators, an airbag, and a controller. The airbag includes a front passenger seat airbag, and a center airbag that includes a vehicle-rear-side end that projects out further toward a vehicle rear side when inflated and deployed than a rear end of the front passenger seat airbag when inflated and deployed. The controller controls timings for igniting each squib included in the plurality of inflators such that a peak internal pressure of the airbag inflated and deployed when an oblique collision or small overlap collision has occurred is delayed, compared to a peak internal pressure of the airbag inflated and deployed when a head-on collision has occurred.

What is claimed is: 
     
       1. A vehicle front passenger seat airbag device comprising:
 a plurality of inflators each comprising a squib; 
 an airbag including:
 a front passenger seat airbag that is inflated and deployed on receipt of gas supplied from the plurality of the inflators, and that is inflated and deployed at a vehicle front side of an occupant seated in a front passenger seat, and 
 a center airbag that is inflated and deployed at a vehicle width direction center side of the front passenger seat airbag, and that includes a vehicle-rear-side end that projects out further toward a vehicle rear side when inflated and deployed than a rear end of the front passenger seat airbag when inflated and deployed; and 
 
 a controller that controls timings for igniting each squib included in the plurality of inflators such that a peak internal pressure of the airbag inflated and deployed when an oblique collision or small overlap collision has occurred is delayed, compared to a peak internal pressure of the airbag inflated and deployed when a head-on collision has occurred, wherein 
 the controller causes a timing for igniting at least one of the squibs ignited second or later out of the squibs included in the plurality of inflators to be delayed in cases in which an oblique collision or small overlap collision has occurred, compared to a timing for igniting the corresponding squib in cases in which a head-on collision has occurred; 
 the plurality of inflators include a first squib, a second squib, and a third squib; and 
 the controller causes:
 the second squib and the third squib to ignite, after igniting the first squib and at substantially a same time as each other in cases in which a head-on collision has occurred, and 
 the third squib to ignite, after sequentially igniting the first squib and then the second squib and before inflation and deployment of the airbag is completed in cases in which an oblique collision or small overlap collision has occurred. 
 
 
     
     
       2. The vehicle front passenger seat airbag device of  claim 1 , wherein
 the plurality of inflators include a first inflator and a second inflator disposed side-by-side in the vehicle width direction, 
 the first inflator is a dual-type inflator including the first squib and the third squib, and 
 the second inflator is a single-type inflator including the second squib. 
 
     
     
       3. The vehicle front passenger seat airbag device of  claim 1 , wherein
 in a case in which a seat slide position of a seat cushion of the front passenger seat is positioned closer to the vehicle front side than a predetermined position in a vehicle length direction, the controller controls the timing for igniting each squib under a first control, and 
 in a case in which the seat slide position of the seat cushion is positioned closer to the vehicle rear side than the predetermined position in the vehicle length direction, the controller controls the timing for igniting each squib under a second control different than the first control. 
 
     
     
       4. The vehicle front passenger seat airbag device of  claim 1 , wherein
 in a case in which a degree of severity of the collision is greater than a predetermined threshold value, the controller controls the timing for igniting each squib under a first control, and 
 in a case in which the degree of severity of the collision is less than or equal to the predetermined threshold value, the controller controls the timing for igniting each squib under a second control different than the first control. 
 
     
     
       5. A vehicle front passenger seat airbag device comprising:
 a plurality of inflators each comprising a squib; 
 an airbag including:
 a front passenger seat airbag that is inflated and deployed on receipt of gas supplied from the plurality of the inflators, and that is inflated and deployed at a vehicle front side of an occupant seated in a front passenger seat, and 
 a center airbag that is inflated and deployed at a vehicle width direction center side of the front passenger seat airbag, and that includes a vehicle-rear-side end that projects out further toward a vehicle rear side when inflated and deployed than a rear end of the front passenger seat airbag when inflated and deployed; and 
 
 a controller that controls timings for igniting each squib included in the plurality of inflators such that a peak internal pressure of the airbag inflated and deployed when an oblique collision or small overlap collision has occurred is delayed, compared to a peak internal pressure of the airbag inflated and deployed when a head-on collision has occurred, wherein 
 the controller causes a timing for igniting at least one of the squibs ignited second or later out of the squibs included in the plurality of inflators to be delayed in cases in which an oblique collision or small overlap collision has occurred, compared to a timing for igniting the corresponding squib in cases in which a head-on collision has occurred; 
 the plurality of inflators include a first squib, a second squib, and a third squib; and 
 the controller causes:
 the second squib and the third squib to ignite, after igniting the first squib and at substantially a same time as each other in cases in which a head-on collision has occurred, and 
 the third squib to ignite, after sequentially igniting the first squib and then the second squib and after inflation and deployment of the airbag is completed in cases in which an oblique collision or small overlap collision has occurred. 
 
 
     
     
       6. The vehicle front passenger seat airbag device of  claim 5 , wherein
 the plurality of inflators include a first inflator and a second inflator disposed side-by-side in the vehicle width direction, 
 the first inflator is a dual-type inflator including the first squib and the third squib, and 
 the second inflator is a single-type inflator including the second squib. 
 
     
     
       7. The vehicle front passenger seat airbag device of  claim 5 , wherein
 in a case in which a seat slide position of a seat cushion of the front passenger seat is positioned closer to the vehicle front side than a predetermined position in a vehicle length direction, the controller controls the timing for igniting each squib under a first control, and 
 in a case in which the seat slide position of the seat cushion is positioned closer to the vehicle rear side than the predetermined position in the vehicle length direction, the controller controls the timing for igniting each squib under a second control different than the first control. 
 
     
     
       8. The vehicle front passenger seat airbag device of  claim 5 , wherein
 in a case in which a degree of severity of the collision is greater than a predetermined threshold value, the controller controls the timing for igniting each squib under a first control, and 
 in a case in which the degree of severity of the collision is less than or equal to the predetermined threshold value, the controller controls the timing for igniting each squib under a second control different than the first control. 
 
     
     
       9. A vehicle front passenger seat airbag device comprising:
 a plurality of inflators each comprising a squib; 
 an airbag including:
 a front passenger seat airbag that is inflated and deployed on receipt of gas supplied from the plurality of the inflators, and that is inflated and deployed at a vehicle front side of an occupant seated in a front passenger seat, and 
 a center airbag that is inflated and deployed at a vehicle width direction center side of the front passenger seat airbag, and that includes a vehicle-rear-side end that projects out further toward a vehicle rear side when inflated and deployed than a rear end of the front passenger seat airbag when inflated and deployed; and 
 
 a controller that controls timings for igniting each squib included in the plurality of inflators such that a peak internal pressure of the airbag inflated and deployed when an oblique collision or small overlap collision has occurred is delayed, compared to a peak internal pressure of the airbag inflated and deployed when a head-on collision has occurred, wherein 
 the controller causes a timing for igniting at least one of the squibs ignited second or later out of the squibs included in the plurality of inflators to be delayed in cases in which an oblique collision or small overlap collision has occurred, compared to a timing for igniting the corresponding squib in cases in which a head-on collision has occurred; 
 the plurality of inflators include a first squib, a second squib, and a third squib; and 
 the controller
 in cases in which a head-on collision has occurred, causes the second squib and the third squib to ignite, after igniting the first squib and at substantially a same time as each other, and, 
 in cases in which an oblique collision or small overlap collision has occurred, based on a front-rear position of the seat of the occupant or on a degree of severity of the collision, switches between
 first control, causing the third squib to ignite, after sequentially igniting the first squib and then the second squib and before inflation and deployment of the airbag is completed, and 
 second control, causing the third squib to ignite, after sequentially igniting the first squib and then the second squib and after inflation and deployment of the airbag is completed. 
 
 
 
     
     
       10. The vehicle front passenger seat airbag device of  claim 9 , wherein
 the plurality of inflators include a first inflator and a second inflator disposed side-by-side in the vehicle width direction, 
 the first inflator is a dual-type inflator including the first squib and the third squib, and 
 the second inflator is a single-type inflator including the second squib. 
 
     
     
       11. The vehicle front passenger seat airbag device of  claim 9 , wherein
 in a case in which a seat slide position of a seat cushion of the front passenger seat is positioned closer to the vehicle front side than a predetermined position in a vehicle length direction, the controller controls the timing for igniting each squib under the first control, and 
 in a case in which the seat slide position of the seat cushion is positioned closer to the vehicle rear side than the predetermined position in the vehicle length direction, the controller controls the timing for igniting each squib under the second control. 
 
     
     
       12. The vehicle front passenger seat airbag device of  claim 9 , wherein
 in a case in which the degree of severity of the collision is greater than a predetermined threshold value, the controller controls the timing for igniting each squib under the first control, and 
 in a case in which the degree of severity of the collision is less than or equal to the predetermined threshold value, the controller controls the timing for igniting each squib under the second control.